The Franco-Spanish War (1635-1659) was a conflict between the Kingdom of France and the Spanish Empire during the larger context of the Thirty Years' War. The war arose from territorial disputes and the struggle for dominance in Europe. It involved significant battles and military campaigns, impacting both nations' economies and political landscapes. The war concluded with the signing of the Treaty of the Pyrenees in 1659, which marked a shift in power. France gained territories such as Roussillon and Artois, while Spain recognized French sovereignty over several regions, ultimately leading to the decline of Spanish influence in Europe.